= Expression Parser =
This function can parse any string containing a mathematical expression like {{{"2 * (34+1)/2 *sin(pi*3)/cosh(7)"}}}. [[br]]
Usage: Pass a std::string to the constructor and the ExprParser will parse an expression that equals one number. That means that {{{"3 4"}}} will yield 3. Then you can use the following query functions:
|| getRemains() || Returns the rest of the string that did get parsed ||
|| getResult()  || Query the result of the parsing ||
|| getSuccess() || Tells whether any number could be retrieved at all ||

== Supported functions ==
sin, asin, sinh, asinh, cos, acos, cosh, acosh, tan, atan, atan2, tanh, atanh,
int, floor, ceil, abs, exp, log, ln, sign, sqrt, degrees, radians, mod, pow, div, max, min

== Supported variables ==
|| pi || 3.1415926535897932 ||
|| e  || 2.7182818284590452 ||